-2- 



not earlier. Control experiments in 1959 with baits used on the foreheads of dairy- 

 cattle appeared promising and may soon he recommended. 



Elm leaf beetles : These insects may soon appear in southern Illinois. 

 Elm leaves will be skeletonized by small, dirty, yellow to black, ugly, spiny larvae. 

 This pest is particularly severe on Chinese elms. To control them, use 4 to 6 

 pounds of lead arsenate, 2 pounds of 50 percent wettable DDT powder or 2 quarts of 

 25 percent DDT emulsifiable concentrate per 100 gallons of water as a spray. 



Eastern tent caterpillars : This insect is now building nests in the forks 

 of wild cherry trees along roadsides. It also attacks some fruit trees. Lead 

 arsenate sprays aid in reducing numbers when control is necessary. 



Caution : Before applying insecticides, read labels carefully and follow 

 all precautions. This not only will insure personal safety, but also wiH eliminate 

 insecticide residue hazards. 



******** 



This weekly report was prepared by H. B. Petty, Illinois Agricultural 

 Extension Service and Illinois Natural History Survey, in cooperation with the USDA 

 Agricultural Service, Plant Pest Control Branch, from information gathered by ento- 

 mologists and cooperators who send in weekly reports from their own localities. 



HBP:mfb 

 5/6/60 



